JPS6348846Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the improvement of ball-type water stop valves that are attached to meter boxes at the base of water supply pipes led into each house. Its technical feature is that it is equipped with a type check valve.

Conventionally, a top-type stop valve that also has a non-return function has been widely used in meter boxes installed at the base of water supply pipes in general homes, etc., but the non-return function of the above-mentioned stop-type water stop valve In recent years, ball valve type stop valves have come into widespread use as they have been found to be incomplete and have short lifespans due to water erosion at the top. Ta.

Since these ball stop valves do not have a check function, generally a check valve is built into the meter-side connection pipe of the stop valve, or a separate riser pipe is installed downstream of the valve housing. These had a check mechanism with a built-in valve ball, but due to their structure, the entire mechanism was bulky and required a large space for installation, making it difficult to install and remove it in a narrow meter box. In addition to being difficult to operate, it was pointed out that the latter in particular had disadvantages such as extremely large head loss.

In view of these circumstances, the present invention incorporates a cartridge-type check valve with extremely low water head loss and excellent durability into the expandable socket attached to the downstream side of the ball-type water stop valve. , which greatly improved the problems with narrative.

Hereinafter, the configuration will be described in more detail based on the embodiment shown in the drawings. 1 is a ball valve 2 that can freely open and close the flow path.
or 3 is an extensible socket whose large diameter end 3' is slidably fitted into the downstream side 1' of the main body 1; The cartridge type check valve 5 described below is removably housed in the section 3', and cap nuts 4, 4' for connection with the main body 1 and a meter (not shown) are provided at both ends of the socket 3. It is made by fitting.

Next, the structure of the cartridge type check valve 5 is changed to a second one.
To explain according to the drawings, in the drawing, 6 is a valve seat ring having a valve seat 6' on the inner circumferential surface and an annular protrusion 6'' formed on the outside thereof, and 7 is a valve seat ring having the annular protrusion on the front end surface. child 6″
It is a support ring formed by surrounding a concave groove 7' that can be inserted into, and a guide cylinder 9 having a constant inclined surface 9' on the outer periphery is integrally attached to the back side of the support ring through a plurality of vanes 8. It was formed.

Furthermore, 10 is a valve body having a recessed part 10' on the back surface, and the valve pipe 10'' is connected to the guide tube 9.
The recessed portion 10'
A spring 11 with relatively weak elasticity is loaded between the guide tube 9 and the guide tube 9, and in this state, the annular protrusion 6'' of the valve seat ring 6 is press-fitted into the groove 7' of the support ring 7. This constitutes a stop valve unit.

In addition, 12 in the figure is a pressure seal type packing fitted on the outer periphery of the valve seat of the valve seat ring 6, and 13,
Reference numeral 14 indicates a washer and a snap spring for fixing the cartridge type check valve in the socket, and 9'' indicates a recess formed in the front surface of the guide tube 9 as required.

In order to install the water stop valve of the present invention according to the above-mentioned configuration in the meter box, the main body 1 of the water stop valve is screwed onto the water supply pipe side in advance, and the water stop valve body 1 is screwed onto the downstream side 1' of the water supply pipe.
Insert the large diameter end 3' of the socket 3 containing the cartridge type check valve 5 into the socket, and
Connect the other end to the meter side and tighten each bag nut 4,
The tightening of 4' is similar to that before the grace period.

In this case, since the cartridge type check valve 5 in the socket normally maintains its valve body 10 in pressure contact with the valve seat surface 6', the handle 1
5 to open the flow path, the water pressure flowing in from the water supply pipe side resists the pressing pressure of the spring 11 and retreats the valve body 10 all at once, causing the rear circumferential wall of the valve body 10 to move against the guide tube 9. It is brought into contact with the

On the other hand, inside the check valve, the entire area inside the pivot housing excluding each vane plate 8 constitutes a wide water flow space, and a certain slope is formed on the back surface of the guide tube 9 that the valve body 10 comes into contact with. These functions work together to allow the passage of a large amount of feed water, while also reliably preventing turbulence on the downstream side, thereby minimizing head loss.

Furthermore, the check valve of the present invention utilizes a low-elasticity spring to press the valve body against the valve seat surface.
Since the valve body 10 is designed to be able to retreat all at once and come into contact with the guide cylinder even under relatively low water pressure, the operation of the valve is extremely stable compared to various conventional check valves. Furthermore, when the valve is opened, the spring 11 is completely surrounded between the concave portion 10' of the valve body 10 and the guide tube 9, so that the spring 11 is not washed away by the water supply, and as a result, the spring 11 is not washed away by the water supply. A normal spring load can be obtained over a long period of time without causing fatigue or other adverse effects on the spring 11.

Furthermore, since the proposed stop faucet has a cartridge-type check valve with the above-mentioned exceptional performance removably installed in the telescopic socket, in the event of a malfunction or repair of the check valve, the above-mentioned check valve should be replaced. Not only can repairs be made immediately by simply replacing the unit, but unlike conventional valves that have a separate or built-in check valve, the entire stop valve, including the flow meter, cannot fit inside a standard meter box. It can be installed without any
Moreover, since it can be connected and removed extremely easily, it brings about many remarkable practical advantages, such as the ability to inspect and replace the check valve each time the flow meter is inspected regularly. .

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view of the central part of the proposed water stop valve, and Figure 2
The figure is a vertical sectional view of the center of a cartridge type check valve, with the upper half showing the closed state and the lower half showing the open state, and Fig. 3 shows the cartridge with the left half omitted. FIG. 3 is a right side view of the type check valve. In addition, in the figure 1... Water stop valve main body, 2... Ball valve,
3... Telescopic socket, 4, 4'... Bag nut, 5
...Cartridge type check valve, 6... Valve seat ring, 7...
... Support ring, 8 ... Wing plate, 9 ... Guide tube, 10 ...
Valve body, 11...spring.

Claims (1)

[Scope of utility model registration request] In a ball type water stop valve equipped with a telescoping socket on the downstream side, the large diameter end of the telescoping socket,
A support ring that has a valve seat on its inner circumferential surface and a guide tube formed through a plurality of vanes on its back surface, and a concave portion on its back surface, so that the valve tube can be slidably fitted into the guide tube. A water stop valve characterized in that a cartridge-type check valve is removably housed inside the cartridge-type check valve, which is made up of a valve body inserted into the valve body, and a spring with relatively low elasticity that is elastically loaded between a concave portion of the valve body and a guide cylinder. .